Abstract
The presence of 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (DDT) in the environment is becoming a serious problem because of its strong toxicity and mutagenicity. Utilization of agricultural residue, oil palm empty fruit bunch (EFB), in the environmental technology area is still limited. On the other hand, wood meal showed the ability to be used for pre-grown source of fungi. For that reason, the ability of Trametes versicolor U97 pre-grown in wood meal and EFB to degrade DDT in soil was investigated. DDT in soil was degraded 45 and 54 % by T. versicolor U97 pre-grown in wood meal and EFB during 30 days incubation, respectively. Focusing in T. versicolor U97 pre-grown in EFB, response surface methodology based on a Doehlert experimental design showed that the presence of veratryl alcohol and MnSO4 are needed to maximize degradation of DDT by using ligninolytic enzymes of this strain. Addition of ethylenediaminetetraacetic acid revealed that peroxidase enzymes play a role in degradation of DDT in soil in which several metabolic products were produced.
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